PG18 benchmark report (ROWS=200000)

Compared functions:
- ST_EvilTransform
- Regex_EvilTransform

Scenario: 4326 -> 990001
- ST_EvilTransform: 92.402 ms
- Regex_EvilTransform: 2832.821 ms

Scenario: 990002 -> 3857 (via 4326)
- ST_EvilTransform: 183.856 ms
- Regex_EvilTransform: 8393.272 ms
